Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
The reindeer is the only mammal that can see UV light.
17
Cats lose almost as much fluid in the saliva while grooming themselves as they do through urination!
205
Dogs sometimes fake being sick to get attention.
26